Finding the Fourth Proportional to 115,282.50, 159,089.85 and 64,981.50

Step by Step Solution

1. Step 1: Write the proportion equation
   115,282.50 : 159,089.85 = 64,981.50 : x
2. Step 2: Convert to fraction form
   115,282.50/159,089.85 = 64,981.50/x
3. Step 3: Cross multiply
   115,282.50x = 159,089.85 × 64,981.50
4. Step 4: Simplify right side
   115,282.50x = 10,337,897,087.78
5. Step 5: Solve for x
   x = 10,337,897,087.78/115,282.50
6. Step 6: Final answer
   x = 89,674.47